What is the greatest advantage of a dorsal style wrist-hand orthosis (WHO) over a volar style?

The greatest advantage of a dorsal style wrist-hand orthosis (WHO) over a volar style is that it allows tactile sensation. This design exposes the volar aspect of the hand, preserving the sensory receptors that are crucial for tactile feedback. By maintaining an unobstructed area on the palm, the wearer can engage more effectively with their environment, enhancing their ability to grasp and manipulate objects.

In contrast, while a volar style orthosis typically provides more coverage and may offer additional stability, this increased coverage can inhibit sensory input from the palm. The preserved tactile sensation in a dorsal design can be particularly beneficial for individuals who require feedback for motor control or who are in the process of rehabilitation, allowing them to fine-tune their movements based on what they feel.

The other aspects such as circulation improvement and limiting wrist motion are not directly enhanced by the dorsal style, as those features can vary based on individual design and fit. Thus, the ability to maintain tactile sensation is a distinctive advantage of a dorsal wrist-hand orthosis design.